1BL1

PTH RECEPTOR N-TERMINUS FRAGMENT, NMR, 1 STRUCTURE


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 
  • Selection Criteria: LEAST PENALTY VIOLATION 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Binding domain of human parathyroid hormone receptor: from conformation to function.

Pellegrini, M.Bisello, A.Rosenblatt, M.Chorev, M.Mierke, D.F.

(1998) Biochemistry 37: 12737-12743

  • DOI: 10.1021/bi981265h
  • Primary Citation of Related Structures:  
    1BL1

  • PubMed Abstract: 
  • A 31 amino acid fragment of the extracellular N-terminus of the human G-protein coupled receptor for parathyroid hormone (PTH1R) has been structurally characterized by NMR and molecular dynamics simulations. The fragment PTH1R[168-198] includes resid ...

    A 31 amino acid fragment of the extracellular N-terminus of the human G-protein coupled receptor for parathyroid hormone (PTH1R) has been structurally characterized by NMR and molecular dynamics simulations. The fragment PTH1R[168-198] includes residues 173-189, shown by photoaffinity cross-linking to be a contact domain with position 13 of parathyroid hormone (PTH). The structure of PTH1R[168-198], determined in a micellar solution of dodecylphosphocholine to mimic the membrane environment, consists of three alpha-helices, separated by a well-defined turn and a flexible region. The topological orientation of PTH1R[168-198] was determined from nitroxide-radical induced relaxation of NMR signals utilizing 5- and 16-doxylstearic acid. The C-terminal helix (residues 190-196), consisting of seven amino acids of the first transmembrane domain, is very hydrophobic and embedded in the lipid core. This helix is preceded by a well-defined turn, forming an approximate 90 degrees bend, placing the other helices (residues 169-176 and 180-189), both of which are amphipathic, on the surface of the micelle. In this orientation, many hydrophilic residues of the receptor, including Glu177, Arg179, Arg181, Glu182, Asp185, and Arg186, are projecting toward the solvent available to form complementary Coulombic interactions with the polar residues of the principal binding domain of the ligand (e.g., Arg25, Lys26, Lys27, Asp30, and His32). Given that the binding domain of PTH adopts an amphipathic alpha-helix which lies on the membrane, we visualize ligand binding as a two stage process involving a nonspecific hydrophobic interaction of amphipathic helices with the membrane, followed by two-dimensional diffusion leading to highly specific, ligand-receptor interaction.


    Organizational Affiliation

    Department of Molecular Pharmacology, Physiology, & Biotechnology, Division of Biology & Medicine, Brown University, Providence, Rhode Island 02912, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
PARATHYROID HORMONE RECEPTORA31Homo sapiensMutation(s): 0 
Gene Names: PTH1RPTHRPTHR1
Find proteins for Q03431 (Homo sapiens)
Explore Q03431 
Go to UniProtKB:  Q03431
NIH Common Fund Data Resources
PHAROS  Q03431
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 
  • Selection Criteria: LEAST PENALTY VIOLATION 
  • OLDERADO: 1BL1 Olderado

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1999-03-30
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance